Back sleeping

25 weeks pregnant. At how many weeks should be legitimately stop purposely sleeping / laying on our backs?

I’m hearing from multiple different sources, different answers. My physiotherapist told me I needed to stop at 24 weeks, my GP said around the 3rd trimester and Google goes between 20 weeks and 28 weeks!?!

I love sleeping on my back. I’m most comfortable like that. I also feel the baby kick 10x more if I lay on my back but I guess I have to stop now

When did you stop purposely laying on your back? Or what week were you advised to stop?